YASKAWA SGD7S-R70A20A023F40B, Product Manual

Page: 172 / 342

5.2 FT41 Specification
5.2.3 Troubleshooting Alarms
5-84
A.C51:
Overtravel
Detected during
Polarity Detection
The overtravel signal
was detected during
polarity detection.
Check the overtravel
position.
Wire the overtravel sig-
nals. Execute polarity
detection at a position
where an overtravel sig-
nal would not be
detected.
*1
A.C52:
Polarity Detec-
tion Not Com-
pleted
The servo was turned
ON when using an
absolute linear
encoder, Pn587 was
set to n.

0 (Do
not detect polarity),
and the polarity had
not been detected.
–
When using an absolute
linear encoder, set Pn587
to n.

1 (Detect polar-
ity)
–
A.C53:
Out of Range of
Motion for Polar-
ity Detection
The travel distance
exceeded the setting
of Pn48E (Polarity
Detection Range) in
the middle of detec-
tion.
–
Increase the setting of
Pn48E (Polarity Detection
Range). Or, increase the
setting of Pn481 (Polarity
Detection Speed Loop
Gain).
–
A.C54:
Polarity Detec-
tion Failure 2
An external force was
applied to the Servo-
motor.
–
Increase the setting of
Pn495 (Polarity Detection
Confirmation Force Refer-
ence).
Increase the setting of
Pn498 (Polarity Detection
Allowable Error Range).
Increasing the allowable
error will also increase the
motor temperature.
–
A.C80:
Encoder Clear
Error or Multiturn
Limit Setting Error
A failure occurred in
the encoder.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Servomotor or
linear encoder may be
faulty. Replace the Servo-
motor or linear encoder.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference